“…In this sense, publications about acoustic damage to the auditory system, classroom acoustic analysis and noise pollution represent important part of the references available for this work (Bastos, Cardoso, & De Melo, 2010;Pereira et al, 2004;Guidini et al, 2012;Almeida Filho et al, 2012;Oiticica, Alvino, & Da Silva, 2006;Batista et al, 2010;Dreossi & Momensohn-Santos, 2005;Fernandes, 2006;Levandoski, 2013;Gonçalves, Da Silva, & Coutinho, 2009;Gonçalves et al, 2006 16 ; Dos Santos, 2012;Tavares, 2016;Pereira Branco, 2013;Mendes et al, 2016;Rodrigues, 2010;Moscati, 2013;Bistafa, 2004;Amorim & Licarião, 2005;Amorim et al, 2008;Martins et al, 2008;Sonoda, 2016;Lacerda et al, 2005;Taxini & Guida, 2008;Da Paz, Ferreira, & Zannin, 2005;Crosato et al, 2007;Howard & Angus, 2001;Beranek, 1969;Fahy & Walker, 2004;Everest, 2001;Valle, 2009;Borges, 2009;Takahashi & Bertoli, 2012;Kuttruff, 2000 2013). About the concept of polarity inversion for the phase cancellation some publications are more representative, however, there are only rare references to applications in the sense proposed here (Ballou, 2009: p. 57;Gibson, 1997: p. 67;Howard & Angus, 2001: p. 55;…”